Electrical condenser



W. DUBILIER ELECTRICAL CONDENSER June 24, 1930.

Filed July 29, 1926 2 Sheets-Sheet l ATTORNEY June 24, 1930. w. DUBILIQER 1,768,441

ELECTRICAL CONDENSER Filed July 29 1926 2 Sheets-Sheet 2 INVENTOR MAI/ 4 0l/15/L/f2 I p 7Q ATTORNEY Patented June 24, 1930 UNITED PAT ENT OFFICE WILLIAM DUBILIER, OF NEW ROCHELLE, NEW YORK, ASSIGNOR TO DUIBILIEB: CON- DENSER CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE ELECTRICAL CONDENSER Application filed July 29,

This invention relates to improvements in electrical condensers, particularly rolled or wound condensers. I An object of the invention is to provide a simple but durable and eflicient electrical condenser which is inexpensive to manufacture, and which has attached to it means ofsufiicient strength to enable the condenser to be securely mounted on a support and connected into circuit, said means comprising no more material than is actually required for the purpose.

Other objects and advantages of my invention are set forth in the followin description and the novelty of the invention is pointed out in the claims. But I of course reserve the right to make any changes in shape, size and arrangement of parts that come within the nature and scope of theinvention as the claims define same.

On the drawings Figure I is a perspective view of one form of condenser according to my invention;

Figure 2 is a similar view of a different form; v

Figure 3 is a similar View of another form;

Figure 4 illustrates the means for mounting the condenser of Figure 3;

igures 5 and 6 are perspective views of additional forms, shown in part;

Figure 7 shows in perspective a further form; :and

lligure 8 is a view to indicate how the body of a condenser of this type is made.

The same numerals identify the same parts throughout.

Referring first to Figure 8 which is here presented for the purpose of illustrating how the body of a rolled or wound condenser is made, I show at 1 a'sheetof conductive material such as metal foil placed on top of a sheet of insulating material such as paper 2; and 3 is another sheet of metal foil placed beneath the aforesaid sheet of insulation 2 and on top of another and similar sheet of insulation 4 so that the sheet 3 lies between the sheets 2 and 4. As shown, the edgeof the sheet of metal foil 1 pro- 1926. Serial No. 125,797.

jects on one side beyond the adjacent edges of the sheets of insulation 2 and 4, and the sheet of metal foil 3 projects at the o posite side along one edge beyond the a acent edges of the sheets 2 and 4. vWhen the sheets 1, 2, 3 and 4 are wound u to make a roll, one edge of the sheet of oil 1 will project at one end of this roll, and one edge of the sheet of foil 3 at the other end; while the opposite edges of the sheets of foil 1 and 3 will be inside the roll andcovered by the sheets of insulation 2 and 4=-which overlap same. In practice, the ends of the sheets of insulation 2 and 4 are caused to project beyond the ends of the sheets of foil 1 and 3 so that the insulation, which is paper or some other suitable material, can be wound up in several turns on a rod or roller 5 before winding of the sheets of foil 1 and 3 begins, and when the operation of winding is finished, the roll of foil and insulation which is cylindrical in form, is taken off the rod or spindle 5 and compressed so as tofiatten it as much as possible and provide it with top, bottom and sides, as indi cated at 6 in Figure 1. By connecting'terminals to the projecting edges of the two sheets of foil, the condenser can be put in circuit, and the sheets of foil will be of op osite polarity in operation.

er compressing the body 6 of the condenser and giving it the shape required, it is covered with a wrapping or sleeve of some suitable material such as cardboard, providing a casing 7. The material of the casing 7 is simply bent and folded around the body 6 of the condenser and secured in place in any suitable way, the ends of this wrapping or tubular casing 7 being open. Such a condenser can be placed in circuit by joining terminals to the projecting edges of the sheets of foil 1- and 3 as above deminal tabs or contact strips ,8 and 9, one of which is secured to the projecting edge of one of the conductive elements or sheets of foil, such as the edge of the sheet 1, for example, and the other tab is secured to the rojecting edge of the conductive element of opposite polarity, such as the sheet 3. These contact strips may be soldered in place and they may pro ect through openings in one of the sides of the casing 7 and be perforated at their outer ends to enable conductors to be conveniently connected thereto. Preferably, the means for mounting the condenser should be of some material stronger than cardboard, and as shown in Figure 1, I employ a trough shaped or channel shaped member 10 having two up-turned sides 11 between which the side of the casing with the body of the condenser which is therein is received. To hold this member in place, tubular eyelet rivets 12 may be passed through the two u -tnrned sides 11, these rivets being expande at their ends to secure them in place. The casing is somewhat longer than the body of the condenser so that the ends of the casing project beyond the ends of the body 6 and the rivets 12 ass through the casing onl and do not maiie contact with any part 0 the body 6. The bottom of the trough shaped member 10 is extended at 13 to provide mounting lugs and these lugs may be perforated as shown at 14.

With this construction, an inexpensive but very efficient and durable condenser can be made up and it can be securely mounted in any position by means of the member 10; and fastening devices of any suitable kind may be passed through the apertures 14. If desired, the ends ofthe casing 7 may be filled with wax to embed the rivets 12 and seal the body 6 in the casing. In Figure 2, the construction is similar, except that the trough shaped member 10 is not secured by rivets to the casing 7, but instead the bottom of the trough shaped member is extended at the ends as indicated at 15, and these ends are doubled over to grip one side of the casing 7 at the edge of the opposite ends thereof and eyelet rivets 16 hold the double portions of the ends of the bottom of the member securely in gripping position. With the condenser shown in Figure 3, I employ two separate fastening members each consisting of a perforated tab 17 having an aperture 18 therein. Attached toeach tab 17 are upright portions 19 doubled over as indicated at 20 to provide channel shaped clips to hold the mounting members in lace. These members are attached by slipping the edges of the casing 7 on the opposite ends thereof into the channel shaped clips in the manner illustrated by Figure 3 and then tightening the clips by pressing the portions 19 and 20 together. Thus the edges of the two wider sides or faces of the casing of the condenser are securely engaged at their opposite ends, and the condenser can bem'ounted as before by fastening devices passed through the apertures 18. .The tab 17 may extend into the ends of the casing 7 to a slight extent, and for this urpose may be shouldered slightly, as in 'cated at 21 so that the bottom faces of the tabs are flush with the adjacent surfaces of the casing 7. In Figure 5 the means for mounting the casing also serve as means for making connections thereto. The means in question comprises a cli at each end constituted of a strip of meta 22 which is bent at 23 so that it can be soldered to the projecting edge of one of the sheets of foil of the condenser 6. The stri 22 projects out of the casing 7 and is doubled upon itself at 24 to grip the edge of the casing 7 at the ad'acent end, and an eyelet rivet 25 is employe to hold the doubled portion of the strip in gripping position. As will be understood, one of these clips may be used at each end of the condenser so that connection to the sheets of foil of opposite polarity can be made, and the casing mounted as desired. These clips may be attached to the faces of the casing 7, as indicated in Figure 5, or the side as indicated in Fi 'ure 6; or the clip at one end may be secured as in Figure 5, and at the opposite end as indicated in Figure 6, if sodesired.

Figure 7 shows a mounting member 10", similar to that indicated in F igures 1 and 2, but this mounting member has one relatively short up-turned side 26, two extended ends 28, the opposite upturned side 29 being longer and extending beyond the casing 7. From the bottom 28 and the side 29 are stamped or cut tongues 30 which are bent over the adjacent edges of the casing 7, and the side 26 may have projecting tongues 27 at its opposite ends which are bent over the adjacent edges of the two ends of the casing 7 in the same way.

With this type of condenser, I have provided a device which can be inexpensively produced, which is capable of practical and efiicient service, which is securely housed and can be mounted firmly in position as desired.

Having described my invention, what I believe to be new and desire to secure and protect by Letters Patent of the United States is 1. A condenser comprising a body, a casing in the form of a sleeve for the body, and having its ends projecting beyond the ends of the body, and clamping means engaging theprojecting ends of said casing to enable the condenser to be mounted in position.

2. A condenser comprising a body, :1 casing in the form of a sleeve for the body and having its ends projecting beyond the ends of the body, and a mountin member extending along one side of' said casing and extending beyond the projecting ends thereof.

3. A condenser comprising a body, a casing in the form of a sleeve for the body and having its ends projecting beyond the ends of the body, and a mounting member extendextending beyond the projecting ends there-' of, said member having a plurality of tongues at each end to engage the projecting ends of the casing and secure said member thereto.

5. A condenser comprising a body, a casing in the form of a sleeve for the body and having its ends projecting beyond the ends of the body, and a mounting member doubled to grip the edge of one end of said casing.

6. A condenser comprising a body, a casing for the body in the form of a sleeve having its ends projecting beyond the ends of the body, and means for mounting the condenser comprising a perforated portion extending beyond an end of the casing and enga ing said end of the casing, said means also aving a portion doubled over the edge of the casin at said end.

7. A con enser comprising a body, a casing projecting beyond the ends of the body, a mounting member trough-shaped to receive one side of said casing, said member having its bottom and one side projecting beyond one end of the casing, and tongues carried by the bottom and sides of the member to rip the edges of the casing at the two ends 0 same. i

8. A- condenser comprisin a body, and casing in the form of a sti wrapping enclosing the condenser, said casing being open at its ends and means engaging the opposite open ends of the casing for mounting the cpndenser.

9. A condenser comprising a body, and casing in the form of a stiff insulating wrapping covering said body, said casing being open at its opposite ends, and a member attachedto both ends of said casing and gripping the same at said ends for mounting the condenser.

10. A condenser comprising a body, and casing in the form of a sleeve enveloping the body, and open at its ends, a plate engaging the outer face of the casing, one end of the plate being turned over the edge of the easing at one end and extending beyond the casing at the opposite end, said plate extending over the casing at said opposite end and enga ing the casing on opposite sides,

the plate eing thus attached to the casing.

In testimony whereof I aflix my signature.

WILLIAM DUBILIER. 

